https://www.ncbi.nlm.nih.gov/Structure/pdb/4XTT
4XTT: Structural Studies of Potassium Transport Protein KtrA Regulator of Conductance of K+ (RCK) C...
Putative potassium transport protein(2R,3R,3aS,5R,7aR,9R,10R,10aS,12R,14aR)-2,9-bis(6-amino-9H-purin-9-yl)octahydro-2H,7H-difuro[3,2-d:3',2'-j][1,3,7,9,2,8...